Making A DIY Anamorphic Lens - Page 8 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #71 of 170 Old 08-13-10, 08:23 PM Thread Starter
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Re: Making A DIY Anamorphic Lens

Yes..Looking at the calculator for a 100" scope screen with no zoom on that projector, the projector would be approx.8.5' back..
That's going to give you a very bright image from that distance!..

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post #72 of 170 Old 01-11-11, 07:33 AM
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Re: Making A DIY Anamorphic Lens

[commercial post] Mods please remove if inappropriate.

The topic of making a 4 prism DIY lens has once again come to my attention. In short, you need two prisms of different angles that are made of different materials that once bonded (with opposing apexes), form a new doublet prism. The use of 4 identical prisms does not correct CA.

If I was able to get enough interest, I might be able to produce a short order run.
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post #73 of 170 Old 01-16-11, 02:13 AM
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Re: Making A DIY Anamorphic Lens

HI there.

I've been reading this thread with great interest, this could be my next project. Does anyone know of a prism supplier in the UK?

Or where I could import a couple of finished prisms to have a play.

I found this http://www.surplusshed.com/pages/item/l9113d.html any thoughts?

Cheers.

Will

Last edited by Wull; 01-16-11 at 02:18 AM.
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post #74 of 170 Old 01-16-11, 02:49 AM
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Re: Making A DIY Anamorphic Lens

The prisms from SS are the same prisms also known as "the French" prisms. Whilst they are made from BK7 and do feature optic coatings, they are not corrected for CA or astigmatism. They are actually quite small as well at about 80mm tall, so your throw needs to be quite long.
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post #75 of 170 Old 01-16-11, 02:59 AM
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Re: Making A DIY Anamorphic Lens

Hi Mark.

Think I'm OK there. My PJ 'jvc350' is 16ft away from my screen at present, and could go back another 4.5ft if required.

I would possibly use a 2.39 108" wide screen.
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post #76 of 170 Old 01-16-11, 03:02 AM
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Re: Making A DIY Anamorphic Lens

Quote:
Mark Techer wrote: View Post
they are not corrected for CA or astigmatism.
Sorry, but what does this mean Mark?
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post #77 of 170 Old 01-16-11, 06:09 AM
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Re: Making A DIY Anamorphic Lens

Quote:
magicj1 wrote: View Post
Sorry, but what does this mean Mark?
CA = Chromatic Aberation




Looking for me, just google my username. I have used the same one for most sites for many years.
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post #78 of 170 Old 01-16-11, 06:14 AM
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Re: Making A DIY Anamorphic Lens

Quote:
lcaillo wrote: View Post
CA = Chromatic Aberation
I see, cheers.

Well if anyone could point me in the right direction for a suitable prism
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post #79 of 170 Old 01-16-11, 06:19 PM
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Re: Making A DIY Anamorphic Lens

Quote:
magicj1 wrote: View Post
I see, cheers.

Well if anyone could point me in the right direction for a suitable prism
Again, only if the mods permit discussion here about them.
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post #80 of 170 Old 01-16-11, 06:31 PM Thread Starter
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Re: Making A DIY Anamorphic Lens

Mark..You can provide a link to an outside supplier if you have one..Otherwise, if it's your own then Will can PM you..

Prof..
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